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Finding the Fourth Proportional to 105,424.74, 145,533.65 and 67,235.54

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Solution

The fourth proportional to 105,424.74, 145,533.65 and 67,235.54 is: 92,815.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,424.74 : 145,533.65 = 67,235.54 : x
  2. Step 2: Convert to fraction form
    105,424.74/145,533.65 = 67,235.54/x
  3. Step 3: Cross multiply
    105,424.74x = 145,533.65 × 67,235.54
  4. Step 4: Simplify right side
    105,424.74x = 9,785,032,482.08
  5. Step 5: Solve for x
    x = 9,785,032,482.08/105,424.74
  6. Step 6: Final answer
    x = 92,815.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.